Velocity vs. time graph for an object is shown. Which parts of the graph represents the object moving
at a constant, positive acceleration?
Velocity vs Time
O W and X
25
20
O X and Y
O Y and Z
Y
Х
15
O W and Z
Velocity (m/s)
10
Z
5
w
0
0
1
4
5
2. 3
Time (s)
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The passage that directs air to the lungs is called a. diaphragm. b. larynx. c. bronchi. d. pharynx.

How is the gravitational force related to the distance between two objects?

Unpolarized light falls on two polarizer sheets whose transmission axes are at right angles. a third polarizer is placed between the first two so that its axis makes a 52-degree angle with the axis of the first polarizer. a) what fraction of the incident light intensity is transmitted through the first polaroid? b) what fraction of the incident light intensity is transmitted through the second polaroid? c) what is the angle of polarization of the light that enters the third polaroid? d) what fraction of the incident light intensity is transmitted through the third polaroid. e) what happens if the middle polaroid is removed?